Contrast jazz and classical music. What difference between these genres is MOST accurate?

How do astronomers measure the amount of dark matter in the universe

This is science by the way which of the following is an example of an environmental pressure a. the air pressure in the atmosphere b. a lake that is gradually running out of water c. a fight between two members of the same species d. breeding between two members of the same species

Identify one similarity between china and europe that explains their decisions on wether to explore or conquer lands around the indian ocean